While creating a synchronization task, the NULL error message appears when a connector with invalid configuration is selected. The null error message files are saved in specific location.
For example, <Secure Agent installation directory>\apps\Data_Integration_Server\logs
The log and exception details of a failed synchronization task are captured under Session Log. You require special permission privileges to run the application in debug mode.
Note: You can enable logs to verify request and SOAP response. For higher batch size (Fetch size) such as 5000 and above, the connector throws a DTM termination error. In such case, it is recommended to set False in Enable Debugger present in connection parameters.